Improvement in seal-locks



6.1. KITsoNa 1. BENNun.

Seal-Locks.

Parenxe'dreb.11,1a73.

AM pHoro-uma smmla ca Mx (asonwf macs UNITED- STATES PATENT CFFGE.

GEORGE L. KITSON AND JOSEPH BENNOR, OF PHILADELPHIA, PA., ASSIGN- ORS TOTHEMSELVES AND GEORGE IV. CARR, OE SAME PLACE.

IMPROVEMENTJN SEAL-LOCKS.

Specification forming part of Letters Patent No. 135,818, dated Februaryll, i573.

To all whom 'it may concern:

Be it'known that we, GEORGE L. KrrsoN and JOSEPH BENNOR, both of thecity and county of Philadelphia, State of Pennsylvania, have invented anImproved Detective-Lock,ofwhich the following is a speeiiication:

The object of our invention is to prevent un authorized persons fromtampering with or attempting to piek the locks of mail-bags, Sto., byenabling any such attempt to be detected with certainty by an afterexamination of the lock; and we accomplish this object by a rotary post,B, having an extension, A, armed with points y y, which, on therevolution of the post, (caused by a key-pickin g instrument, orotherwise,) mutilate a sheet of paper, X, which is confined between ahinged cap, D, and the back of the lock-case H, the mutilation of thepaper indica-tin gto a certainty that thelock has been tampered with. Anopening opposite the mutilator in the cap D may be covered with a sheetof glass, so as to permit the condition'of the paper to be ascertainedwithout opening the case.,

Our invention may be applied to locks of various constructions, but isespecially applicable to the spring-padlock illustrated in theperspective view, Fig. 2, and interior view, Fig. 3, of the accompanyingdrawing.

This loch is or' t-he most simple character, Y

and can be used for mail-bags,casl1boxes, and,

in fact, for any of the purposes to which padlock, one for the hasp andthe other for the hinged cap, it' it be desired to complicate the partsin order to increa se the diiculty oi' piel@ ing the lock.

XVe claim as our invention- The post B, slotted to receive'a key whichoperates the tulnblers of the lock, provided with points, as set forth,and conned so as to have a rotary motion only, as specified.

In testimony whereof we have signed our names to this specification inthe presence ot' two subscribing witnesses.

GEORGE L. KITSON. JOSEPH BENNOR.

lVitnesses:

WM. A. STEEL, HARRY W. Donrr.

